Obama gave his sympathies and "expressed his gratitude for Mr. Suvak's leadership as well as the heroic actions by students, faculty and staff," according to the White House.

Chevron cited in fatal Greene County blast

The Pennsylvania Department of Environmental Protection issued nine citations to Chevron Corp. in connection with the Feb. 11 blast and fire at a Greene County well that killed a subcontractor.

The Pittsburgh Post-Gazette reported Chevron didn't let DEP inspectors and other teams as close to the well as employees. That didn't allow for better air tests and was only rectified when DEP Secretary Chris Abruzzo appealed to Chevron (NYSE: CVX). Other citations included failure to operate a well properly, according to the DEP.

Chevron didn't comment to the Post-Gazette on the citations.

Mylan wins right to market drug

Mylan Inc. said Friday a federal district court has enforced a settlement between the Southpointe-based pharmaceutical company and Endo Pharmaceuticals over the generic version of migrane medication Frova.

The court vacated a January 2014 decision over the medication, which Mylan (Nasdaq: MYL) said could have kept it from launching a generic version of Frova when the patent expires in November 2015. But Mylan said Friday the court's decision cleared the way for the generic version once the FDA approves it.

Airport passenger traffic down 4 percent

Pittsburgh International Airport saw its traffic decline by 4 percent in February, the Allegheny County Airport Authority said.

There were 515,476 passengers served by the airport in February. For the first two months of the year, the latest data available, traffic is down 3.6 percent.

Stocks down Thursday

Many Pittsburgh-region companies joined others in the New York Stock Exchange with declines in trading Thursday.